[Tali's had a long time now of being around humans - she knows that look. But she'll happily ignore it if he's not going to say anything.]

Well, I don't know what causes it, but it's some kind of dimensional rift. Maybe it's a macroscopic manifestation of quantum mechanics gone wrong or.... Whatever it is, Omega's been turned into one. Or a rift has... taken on the form of Omega. I don't know the specifics. Anyway, there's more than one of them. And I came here from another one. You were in one of those.

[Those last sentences especially are reluctant because this all sounds so crazy - but how much crazier, relatively, than waking up to find yourself at the opposite side of the galaxy to where you started out?]